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体感诱发电位检查在先天性脊柱侧凸神经功能评估中的价值

The value of somatosensory evoked potential in the clinical evaluation of congenital scoliosis with and without intraspinal malformations

摘要:

目的 探讨体感诱发电位(SEP)检查在伴脊髓发育畸形的先天性脊柱侧凸(CS)中的诊断价值.方法 回顾性分析2001年9月到2007年9月诊治的187例CS患者临床资料,其中男性85例,女性102例;年龄3~22岁,平均13.8岁.所有患者均行全脊髓磁共振检查判断是否存在脊髓发育畸形.分析术前SEP的峰潜伏期及左、右侧峰潜伏期差值.SEP波形消失、峰潜伏期延长及峰潜伏期不对称定义为SEP异常.比较有无脊髓发育畸形患者的临床特征及SEP异常发生率的差异.结果 共有32例患者伴脊髓发育畸形.CSⅢ型(混合型)伴脊髓发育畸形比例(30.8%)高于Ⅰ型和Ⅱ型(P<0.05).伴脊髓发育畸形组平均侧凸Cobb角大于无脊髓发育畸形组(P<0.05),而两组平均后凸Cobb角差异无统计学意义(P>0.05).伴脊髓发育畸形组SEP异常率与无脊髓发育畸形相比,差异有统计学意义(x2=4.70,P<0.05).结论 SEP检查可以评估CS患者的神经功能状态,对CS伴脊髓发育畸形具有辅助诊断价值.

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abstracts:

Objective To investigate the value of somatosensory evoked potential (SEP) in the diagnosis of congenital scoliosis ( CS) with intraspinal malformation. Methods From September 2001 to September 2007 posterior tibial nerve SEP were performed on 187 operatively treated CS patients. There were 85 male and 102 female, and the average age was 13. 8 years(range from 30 to 22 years). Patients with intraspinal malformations were diagnosed by MRI. Absence of SEP waveforms, prolongation of peek latency or asymmetrical peek latency were defined as pathological change. The incidence of pathological SEP and clinical characteristics were compared between patients with and without intraspinal malformations. Results Of 187 patients, intraspinal malformations were diagnosed in 32 patients ( 17. 1% ) . The incidence of intraspinal malformations was higher in type Ⅲ (30. 8% ) than in type Ⅰ and Ⅱ CS patients (P <0. 05). The mean Cobb angle of scoliosis in patients with intraspinal malformations was greater than without intraspinal malformations, but there was no difference in kyphosis between the two groups. The ratio of abnormal SEP in patients with intraspinal malformations was 75. 0% (24/32) , while it was 38.7% (60/ 155) in patients without intraspinal malformations, and it showed significant difference between the two groups χ2 = 4. 70, P < 0. 05). Conclusions SEP is a reliable tool for assessment of spinal cord function in patients with congenital scoliosis. It could be helpful for the diagnosis of intraspinal malformations, and also might provide an important reference for assessment and treatment of intraspinal malformations in congenital scoliosis.

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